What’s Vulnerable › Vulnerabilities

CVE-2019-3837

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-04-11 · updated 2026-06-17
• Weakness: CWE-362

Description

It was found that the net_dma code in tcp_recvmsg() in the 2.6.32 kernel as shipped in RHEL6 is thread-unsafe. So an unprivileged multi-threaded userspace application calling recvmsg() for the same network socket in parallel executed on ioatdma-enabled hardware with net_dma enabled can leak the memory, crash the host leading to a denial-of-service or cause a random memory corruption.

Affected products

• Linux kernel: 2.6.32
• Red Hat Enterprise Linux: 6.0

References

• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3837
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3837

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